US4261101A - Shaving apparatus with lead cutter - Google Patents

Shaving apparatus with lead cutter Download PDF

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Publication number
US4261101A
US4261101A US05/946,563 US94656378A US4261101A US 4261101 A US4261101 A US 4261101A US 94656378 A US94656378 A US 94656378A US 4261101 A US4261101 A US 4261101A
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US
United States
Prior art keywords
shear plate
lead
cutting
cutting element
guide face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/946,563
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English (en)
Inventor
Eduard W. Tietjens
Ferdinand M. Trees
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
Original Assignee
US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US4261101A publication Critical patent/US4261101A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/42—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards providing for straightening the hair to be cut, e.g. by means of bristles; providing for tensioning the skin, e.g. by means of rollers, ledges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/044—Manufacture and assembly of cutter blocks

Definitions

  • This invention relates to a shaving apparatus having a shear plate with hair-entrance apertures and a cutting member which is reciprocatory relative to the shear plate, which cutting member is provided with cutting elements and lead cutters which are movable relative to the cutting elements.
  • Such a shaving apparatus is for example known from U.S. Pat. No. 3,088,205.
  • a hair which is caught in a hair-entrance aperture is pushed away by the lead cutter in the direction of movement of the cutting member.
  • the hair assumes a position which is unfavorable for cutting.
  • the hairs are pulled inwards by the lead cutters in a movement which is also substantially directed away from the shear plate, which is the most effective direction for the object in view, i.e. to obtain the closest possible shave. Moreover, the hairs are then oriented in this direction and thus assume the most favourable position for cutting.
  • a preferred embodiment is characterized in that a cutting element is provided with a plurality of lead cutters which are combined into one body.
  • a further elaboration of this is characterized in that the lead cutters of a plurality of cutting elements constitute one unit of elastic foil.
  • FIG. 1 shows a shaving apparatus in perspective.
  • FIG. 2 shows on an enlarged scale the shaving apparatus of FIG. 1, partly in side view and partly in cross-section.
  • FIG. 3 is a cross-section on a still larger scale taken on the line III--III in FIG. 2.
  • FIGS. 4 and 5 show a detail of the cross-section of FIG. 3 on an enlarged scale.
  • FIG. 6 shows a cross-section of a variant of the cutting member.
  • FIG. 7 shows a cross-section on an enlarged scale taken on the line VII--VII in FIG. 6.
  • the shaving apparatus in accordance with FIGS. 1 and 2 comprises a housing 1 with a detachable shaving head 2.
  • the shaving head 2 is provided with a shear plate 3 with hair entrance apertures 4.
  • this head is provided with hook-shaped projections 5 which engage with corresponding openings in the shear plate.
  • On the inner side of the shear plate there is disposed a cutting member 6 which is reciprocatory relative to the shear plate.
  • the cutting member 6 is provided with arcuated cutting elements 7 of trapezoidal cross-section (FIG. 3). At their ends the cutting elements 7 are secured to strips 8. These strips 8 are interconnected at their ends by the cross-pieces 9, so that a frame is formed which is the basis of the cutting member.
  • This frame 8, 9 is provided with a pin 10 for coupling the cutting member 6 to the vibrator motor 12 via the drive spindle 11.
  • the pin 10 engages with the slot 13 at the end of the spindle 11.
  • the cavity 14 in the spindle 11 contains a pressure spring 15, which is tensioned between the spindle 11 and the pin 10, so that the cutting member 6 is urged against the inner side of the shear plate 3.
  • the slot 16 enables the ends 17 and 18 of the spindle 11 to move apart elastically, if for example manual force is exerted on the cutting member in the longitudinal direction of the spindle 11.
  • the pin 10 can then pass through the slot 16, so that the cutting member 6 can be mounted or removed in a simple manner.
  • the arcuated cutting elements 7 are provided with lead cutters 19 on both sides.
  • These lead cutters 19 are parts of a body 20 of elastic foil, which comprises central portion 21 which is for example fixed to the wall 22 of the cutting element by spot-welding.
  • the lead cutters 19 are constituted by cut-outs 23 in the body 20. Owing to the curved portion 24 by which the lead cutters 19 are connected to the central portion 21, the lead cutters are elastically movable relative to the associated cutting element.
  • the sharp edge 26 will slightly penetrate the hair, but without cutting off the hair.
  • the reaction force which is exerted on the lead cutter 19 by the hair 25 will generally be directed oppositely to the direction of movement P. This force is compensated for by the component N 1 of the normal force N which is exerted on the lead cutter by the guide face 27 of the cutting element 7, which face is inclined relative to the shear plate 3 (FIG. 4). For the sake of simplicity the small frictional forces between the lead cutter and the cutting elements have been neglected.
  • the component N 2 of the normal force N will cause the lead cutter 19 to slide along the guide face 27 in a movement whose direction is substantially transverse to the shear plate.
  • the angle ⁇ between the guide face 27 and the plane 28 of the cutting element 7 which engages with the shear plate 3 should then be smaller than 90°.
  • the hair 25 will be moved along by the lead cutter 19 until the cutting edge 29 of the cutting element has reached the hair (FIG. 5). Subsequently, the hair will be cut off by cooperation of the shear plate 3 and the cutting element 7. Thus, the hairs are cut more closely and a better shaving result is obtained than in a similar shaving apparatus without lead cutters.
  • the displacement of the lead cutter relative to the shear plate is the sum of the relative displacement of the lead cutter with respect to the cutting element and the displacement of the lead cutter together with the cutting member in the direction of movement P.
  • the lead cutter has moved in a direction normal to the shear plate.
  • the movement will be directed substantially away from the shear plate and towards the interior of the apparatus, so that the action of the lead cutter is most effective.
  • the lead cutter will bring the hairs which are positioned obliquely relative to the shear plate into a position which more closely approximates a position normal to the shear plate, which is more favourable for cutting.
  • the inclined guide faces 27 on both sides of a cutting element 7 take the form of a part of a conical surface.
  • the part of the guide face 27 facing a lead cutter may be regarded as an approximately plane surface.
  • FIGS. 6 and 7 concerns a variant of the cutting member of FIGS. 2 through 5 and components which have not been modified bear the same reference numerals.
  • the cutting element 30 is a circular segment and the lead cutters 31 are formed by cut-outs 32 in a body 33 of elastic foil. These cut-outs may for example be staggered relative to each other on both sides of the cutting element 30.
  • the lead cutter 31 initially engages with the cutting element 30, but upon contact with a hair the lead cutter will move along the guide face 34, so that a clearance 35 is formed between the lead cutter and the cutting element (FIG. 7).
  • the bodies 20, 33 of elastic foil of the various cutting elements may form one unit which be bodily mounted onto or removed from the cutting member.
  • the construction should preferably be such that in the rest condition, for example, when the apparatus is not in use, the lead cutter 19, 31 is already tightened against the associated guide face 27, 34 and is consequently positioned against said guide face with some force.
US05/946,563 1977-11-28 1978-09-28 Shaving apparatus with lead cutter Expired - Lifetime US4261101A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7713047A NL7713047A (nl) 1977-11-28 1977-11-28 Scheerapparaat.
NL7713047 1977-11-28

Publications (1)

Publication Number Publication Date
US4261101A true US4261101A (en) 1981-04-14

Family

ID=19829626

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/946,563 Expired - Lifetime US4261101A (en) 1977-11-28 1978-09-28 Shaving apparatus with lead cutter

Country Status (18)

Country Link
US (1) US4261101A (ja)
JP (1) JPS5819314B2 (ja)
AR (1) AR216182A1 (ja)
AT (1) AT377723B (ja)
AU (1) AU525842B2 (ja)
BR (1) BR7807783A (ja)
CA (1) CA1103436A (ja)
CH (1) CH638127A5 (ja)
DE (1) DE2850827C2 (ja)
ES (1) ES475409A1 (ja)
FR (1) FR2409834A1 (ja)
GB (1) GB2008475B (ja)
HK (1) HK19083A (ja)
IT (1) IT1100196B (ja)
MX (1) MX145186A (ja)
NL (1) NL7713047A (ja)
NZ (1) NZ189000A (ja)
SE (1) SE424832B (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451984A (en) * 1982-01-29 1984-06-05 Kyushu Hitachi Maxell, Ltd. Inner blade for use in reciprocating type electric shaver
US4510687A (en) * 1982-01-13 1985-04-16 U.S. Philips Corporation Shaving apparatus
US4536956A (en) * 1982-02-12 1985-08-27 U.S. Philips Corporation Reciprocatingly drivable cutter for a dry-shaving apparatus
US20060110620A1 (en) * 2004-11-24 2006-05-25 Applied Materials, Inc. Process chamber component with layered coating and method
US20070245565A1 (en) * 2006-04-25 2007-10-25 Matsushita Electric Works, Ltd. Inner cutter of electric shaver and reciprocating electric shaver
WO2011001395A1 (en) 2009-07-03 2011-01-06 Braun Gmbh Cutting unit for an electric razor with skin protectors
USD959055S1 (en) * 2020-02-28 2022-07-26 Anionte International(Zhejiang) Co., Ltd Shaver
USD967537S1 (en) * 2020-01-09 2022-10-18 Braun Gmbh Electric dry shaver

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385448B (de) * 1985-05-02 1988-03-25 Philips Nv Scherkopf fuer einen trockenrasierapparat
AT390393B (de) * 1986-02-17 1990-04-25 Payer Lux Elektroprod Elektrischer rasierapparat

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3088205A (en) * 1961-09-15 1963-05-07 Ellis Robert Dry shaver with hair pulling means to aid in cutting the hair
US3962784A (en) * 1974-04-05 1976-06-15 U.S. Philips Corporation Dry-shaving apparatus
US3967374A (en) * 1974-04-25 1976-07-06 U.S. Philips Corporation Shaving head for a dry-shaving apparatus
US4151645A (en) * 1976-07-07 1979-05-01 U.S. Philips Corporation Dry-shaving apparatus with hair-pulling lead cutters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3088205A (en) * 1961-09-15 1963-05-07 Ellis Robert Dry shaver with hair pulling means to aid in cutting the hair
US3962784A (en) * 1974-04-05 1976-06-15 U.S. Philips Corporation Dry-shaving apparatus
US3967374A (en) * 1974-04-25 1976-07-06 U.S. Philips Corporation Shaving head for a dry-shaving apparatus
US4151645A (en) * 1976-07-07 1979-05-01 U.S. Philips Corporation Dry-shaving apparatus with hair-pulling lead cutters

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510687A (en) * 1982-01-13 1985-04-16 U.S. Philips Corporation Shaving apparatus
US4451984A (en) * 1982-01-29 1984-06-05 Kyushu Hitachi Maxell, Ltd. Inner blade for use in reciprocating type electric shaver
US4536956A (en) * 1982-02-12 1985-08-27 U.S. Philips Corporation Reciprocatingly drivable cutter for a dry-shaving apparatus
US20060110620A1 (en) * 2004-11-24 2006-05-25 Applied Materials, Inc. Process chamber component with layered coating and method
US20070245565A1 (en) * 2006-04-25 2007-10-25 Matsushita Electric Works, Ltd. Inner cutter of electric shaver and reciprocating electric shaver
EP1849567B1 (en) * 2006-04-25 2011-12-28 Panasonic Electric Works Co., Ltd. Inner cutter of electric shaver and reciprocating electric shaver
US8146253B2 (en) * 2006-04-25 2012-04-03 Panasonic Corporation Inner cutter of electric shaver and reciprocating electric shaver
WO2011001395A1 (en) 2009-07-03 2011-01-06 Braun Gmbh Cutting unit for an electric razor with skin protectors
USD967537S1 (en) * 2020-01-09 2022-10-18 Braun Gmbh Electric dry shaver
USD1020093S1 (en) 2020-01-09 2024-03-26 Braun Gmbh Electric dry shaver
USD959055S1 (en) * 2020-02-28 2022-07-26 Anionte International(Zhejiang) Co., Ltd Shaver

Also Published As

Publication number Publication date
DE2850827C2 (de) 1985-01-31
MX145186A (es) 1982-01-12
JPS5819314B2 (ja) 1983-04-18
DE2850827A1 (de) 1979-05-31
AR216182A1 (es) 1979-11-30
FR2409834A1 (fr) 1979-06-22
SE424832B (sv) 1982-08-16
AU4184778A (en) 1979-06-07
ATA842578A (de) 1984-09-15
GB2008475A (en) 1979-06-06
CH638127A5 (de) 1983-09-15
ES475409A1 (es) 1979-10-16
CA1103436A (en) 1981-06-23
NZ189000A (en) 1982-03-30
IT1100196B (it) 1985-09-28
HK19083A (en) 1983-06-17
GB2008475B (en) 1982-03-03
AU525842B2 (en) 1982-12-02
SE7812096L (sv) 1979-05-29
BR7807783A (pt) 1979-07-31
AT377723B (de) 1985-04-25
FR2409834B1 (ja) 1983-09-23
NL7713047A (nl) 1979-05-30
JPS5483569A (en) 1979-07-03
IT7830152A0 (it) 1978-11-24

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